Missed Phonecalls?

[jakfish]

Specs: Cosmo, V21, Tmobile in US

Occasionally, a call to my phone will go directly to voicemail. When I test, as in "Could you call me right now?", the call rings the phone normally.

Does anybody else have this issue? Can't tell if it's the Cosmo or Tmobile, though my wife has a Samsung/Tmobile and doesn't suffer this.

Jake

[Zarhan]

Occasionally, a call to my phone will go directly to voicemail. When I test, as in "Could you call me right now?", the call rings the phone normally.

Does anybody else have this issue? Can't tell if it's the Cosmo or Tmobile, though my wife has a Samsung/Tmobile and doesn't suffer this.

I've had this issue with occasionally with Cosmo, but also with my older phones. It happens when I'm in an area with only 2G coverage. With 3G/4G I've never witnessed this.

Essentially: The phone thinks it's still registered to the network, but cell network doesn't track it properly, so calls don't come in.

My guess is that sometimes the cell network fails to track your location area and when a call comes in, the towers in your old location area attempt to route your call but since you have already moved elsewhere the call does not reach the phone. Putting the phone into flight mode for a second fixes it as that forces a re-registration.

[jakfish]

THANK you for an extremely helpful post. From my testing today, it would seem that you found the problem. I sometimes even have late texts, and when I switched in and out of airplane mode, a text came right in.

One of the weird factors is that this happens predominately on 4G. But perhaps TMo is dumbing down the G's without me seeing it, or perhaps even a dip from 4G to 3G is enough to upset the network.

I'm not certain of anything except your accurate assistance. Much, much obliged,

Jake